8...Be7 is more accurate, to meet 9. Bg5 (intending
to exchange Black's knight in order to gain hold of
the d5-square) by 9...Nxe4! 10. Nxe4 (10. Bxe7 Nxc3
wins a pawn) 10...Bxg5 11. Nxd6+ Ke7 with equality.